Sleeping bag



June 19, 1945. ROBINSON 2,378,434

SLEEPING BAG Filed May 9, 1942 2 Sheets-Sheet 1 Beffak To /b/ op June 19, 1945. B. ROBINSON 3 3 I SLEEPING BAG Filed May '9, 1942 2 Sheets-Sheet 2 Patented June 19, 1945 UNITED TOFF E SLEEPIN BAG Bestor Robinson, United States Army, Oakland, Calif.

Application May 9, 1942, Serial No. 442,304

2 Claims. (01. -343) (Granted under the act of March 3, 1883, as amended April 30, 1928;370 0. G. 757) The invention described herein, if patented, may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to certain new and useful improvements insleeping bags and more particularly to that type of bag known as amummy sleeping bag. e

The primary object of the invention is to provide a sleeping bag composed of a single blank of material, cut, folded and stitchedtogether to form a complete sleeping bag and hood section for the body and head of the occupant- This bag has been constructed in this manner in order that the bag may turn with the'sleeper,

since all-previously-known bags of this type have been constructed so that the sleeper turns inside of the bag. This bag, therefore, makes for a more comfortable as well as a warmer bag with less weight, a very important item to the soldier or camper, since it is so designed that very little additional Weight is added to the shoulder pack.

With the above and other objects and advan tages in view, the invention consists of the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claims.

In the drawings, wherein like reference characters designate corresponding parts throughout the several views,

Fig. 1 is a top plan view of the single blank form from which the sleeping bag is constructed.

Fig. 2 is a topplan view of the completed sleeping bag.

Fig. 3 is a top plan view of the completed sleep-- ing bag in use.

Fig. 4 is a side elevational view of the sleeping bagv in use, and

Fig. 5 is a perspectiveview of the sleeping bag rolled read for transportation.

Referring more in detail to the accompanying drawings, I0 is the blank from which the sleeping bag is constructed; the blank embodying a body portion II and aheadsection l2, formed by notches l3 and M, to provide fold-over portions l6 and I1 respectively in the form of triangular extensions from the body portion at approximately the shoulder line and a central triangular extension notched at IE to form two smaller triangular extensions for correctly forming the hood section when the blank is folded and completed as shown in Fig. 2. Semi-circular openings 18 are formed in the head section l2 to form c0mplete circular opening IQ for the face of the occupant. The blank H is so stitched around its entire perimeter, except where the halves of the interlocking fastener 20 are attached, that the bag encompasses the occupant in a like manner as a mummy is encased. The usual cam slide 2| is provided to join the interlocking elements of the fastener 20 together when the bag is occupied and such an arrangement also permits the occupant to open the upper portion of the bag to facilitate getting into and out of the bag or for turning it inside out for airing.

Fastening means 22 are provided on the lower end of the body portion H for retaining the bag in foldedposition, as shown in Fig. 5. Pull strings 23 are attached to the base of the head section I2 in order that the bag can more readily be adapted to conform to the head of the occupant,

Referring more particularly to the method in which the blank is folded'to form the bag as shown in Fig. 2, the meetingedges 24 of the body portion are stitched together by stitching as referred to above and the meeting edges 25'are stitched together to form a seam 26' in the center of the bag, on its upper surface. In a like manner the edges 26, 21, 28 and 29 are also stitched together, forming the circular opening [9 which is bound by a tape 30 to prevent fraying of the material during use. The bag thus completed will conform to the shape of the occupant and when occupied will turn to either side, depending on the occupant.

It is believedfrom the above description that those skilled in the art will clearly understand the construction of the sleeping bag without going into a more detailed or length statement with regard to the merits and construction of the bag but it is to be understood that this disclosure is merely illustrative and that such changes in the invention may be made as are fairly within the scope and spirit of the following claims.

Having thus described the invention, what is claimed as new and desired to secure by Letters Patent is: f

1. A blank for a sleeping bag comprising a sheet having a wide, saw-toothed top and a narrower straight bottom, the sides being substantially parallel for approximately one-third of the distance downwardly from the topv and converging for their remaining length, said top edge including two triangular projections having their outer edges formed as a continuation of the side edges of the sheet and a larger central triangular projection having a notched extremity, and the outer edges of each of said two projections having a curved notch, said triangular projections being adapted to form a tapered head portion having a face opening when their edges are joined.

2. A sleeping bag comprising an elongated mummy-shaped envelope formed of a sheet of material having two opposite edges joined for a portion of their length to form a front center seam and having the bottom closed by a continuation of the front center seam, said bag having a face opening formed by notches in the said two edges of the sheet and a closable opening below the face 10 

